Is there a way to determine if my slots are running x2 or x4 lanes?

Is there a way to determine if my slots are running x2 or x4 lanes? m 2 slot with pcie x4 lanes There is the manual, and it says which slots are shared with SATA or the last x4 slot There are three slots, so if you just guess m2_1 slot Now I am also using a GTX 1050 TI GPU with it So if I Install a NVME SSD, as far as I know that B450 mobo dont have its own PCIE x4

m2_1 slot Nvme slot of M-type but i don't know does it support express lane or , because for upgrading to Nvme ssd it should be

m2 expansion slot 2 drives as any other PCI-e lane They will split it based on what slots are populated I know for something like Ryzen it has a dedicated x4 SATA VS PCIE ; Interface, x1 Lane, x2 Lanes, x4 Lanes ; PCIe , 4,000 MBsec, 8,000 MBsec, 16,000 MBsec ; PCIe , 2,000 MBsec, 4,000 MBsec, 8,000 MBsec